#315FA8
Closest named color: Mid Blue (#276AB3). oklch(49.1% 0.128 259.3), rgb(49, 95, 168).
Aa
White text reads best on this color (6.30:1).
About this color
#315FA8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.128 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.032 away. White text reads best on it, at 6.30:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.33:1 |
| White text | 6.30:1 |
Values
| HEX | #315FA8 |
| RGB | rgb(49, 95, 168) |
| HSL | hsl(217, 55%, 43%) |
| OKLCH | oklch(49.1% 0.128 259.3) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #315FA8 | 6.30:1 | AA | Lc -86.2 | Fine for body text |
| Black text on #315FA8 | 3.33:1 | AA large text | Lc 23.0 | Dividers and decoration only |
| #315FA8 text on white | 6.30:1 | AA | Lc 81.1 | Fine for body text |
| #315FA8 text on black | 3.33:1 | AA large text | Lc -20.8 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 700.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CCDAF0
oklch(88.5% 0.034 259.4)
-
Step 300
300
#A9C2E9
oklch(80.9% 0.062 259.2)
-
Step 400
400
#7BA2DE
oklch(70.7% 0.098 258.8)
-
Step 500
500
#5989D5
oklch(63% 0.127 259.2)
-
Step 600
600
#3F72C2
oklch(55.6% 0.136 259.1)
-
Step 700
700 (this color)
#315FA8
oklch(49.1% 0.128 259.3)
-
Step 800
800
#294E88
oklch(42.7% 0.106 259.1)
-
Step 900
900
#26416D
oklch(37.7% 0.083 259.7)
-
Step 950
950
#162640
oklch(26.9% 0.053 259.7)
#315FA8 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #3C66AB | 0.024 |
| Deuteranopia (no green cones) | #275BA7 | 0.015 |
| Tritanopia (no blue cones) | #00707B | 0.102 |
| Achromatopsia (no color) | #606060 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #315FA8
#315FA8
oklch(49.1% 0.128 259.3)
- #7F5900
#7F5900
oklch(49.2% 0.102 79.8)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #315FA8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.032
- Denim Blue #3B5B92 ΔE 0.036
- Dusky Blue #475F94 ΔE 0.039
- French Blue #436BAD ΔE 0.041
- Peacock Blue #016795 ΔE 0.048
- Denim #3B638C ΔE 0.050
- Light Navy Blue #2E5A88 ΔE 0.052
- Dusk Blue #26538D ΔE 0.054
Use #315FA8 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.